Efecto del método de cubrición sobre parámetros productivos y reproductivos en porcino

Swine reproductive management is related to prolificacy and numerical productivity. These factors interact with others related to the development of the animals, and / or the previous productive cycle, which influences the economic performance of the swine industry. The aim of this non-experimental work was to evaluate two service methods on productive and reproductive parameters of sows. There were differences between service methods (P <0.05) natural mating (7.48 ± 0.16) and artificial insemination (6.87 ± 0.28) for the variable piglet weight at weaning, where the females inseminated by natural mating presented piglets with greater weight at weaning. There was an effect of the type of service (P <0.05) on the annual parameters of calving/sow/year, productive days/sow/year and non-productive days/sow/year, where the females served by artificial insemination showed higher values in the first two parameters on the females that were inseminated by natural mating, while for the variable non-productive days/sow/year the effect was inversely proportional with respect to service types. The size of litter and the weight of the litter at weaning were decreased as the calving order was increased, defining a critical point or threshold on the 5-6 calving. The litter size was also not affected by the weaning-to-estrus interval, however, an increasing tendency was observed in the case of the females served by natural mating and decreasing in females served by artificial insemination after 4 days of interval in both methods. The studies of numerical productivity, reproductive rhythm and prolificacy should be continued to improve the profitability of the swine company.